:root {
  --primary: #F2C14E;
  --secondary: #FFD36B;
  --bg-dark: #0A0A0A;
  --card-bg: #111111;
  --text-main: #FFF6D6;
  --border-color: #3A2A12;
  --glow: #FFD36B;
  --btn-bg: linear-gradient(180deg, #FFD86A 0%, #DDA11D 100%);
  --header-offset: 122px;
}
html { scroll-behavior: smooth; }
body {
  margin: 0;
  padding: 0;
  background-color: var(--bg-dark);
  color: var(--text-main);
  font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  padding-top: var(--header-offset);
}
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  box-shadow: 0 4px 20px rgba(0,0,0,0.8), 0 0 10px rgba(242,193,78,0.2);
  background: var(--bg-dark);
  border-bottom: 2px solid var(--border-color);
}
.header-top {
  background: #1a1a1a;
  width: 100%;
}
.header-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 30px;
  min-height: 48px;
}
.logo {
  display: inline-block;
  font-size: 28px;
  font-weight: 900;
  color: var(--secondary);
  text-decoration: none;
  letter-spacing: 1px;
  text-shadow: 0 0 10px rgba(255,211,107,0.4);
}
.logo:hover {
  color: var(--glow);
  text-shadow: 0 0 20px rgba(255,211,107,0.8);
}
.main-nav {
  background: #111111;
  width: 100%;
  display: flex;
  justify-content: center;
  border-top: 1px solid var(--border-color);
}
.nav-container {
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 4px 2px;
  padding: 10px 20px;
}
.nav-link {
  color: var(--text-main);
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  padding: 8px 14px;
  border-radius: 4px;
  white-space: nowrap;
  transition: all 0.3s ease;
}
.nav-link:hover {
  color: var(--bg-dark);
  background: var(--secondary);
  box-shadow: 0 0 12px rgba(255,211,107,0.5);
}
.desktop-nav-buttons {
  display: flex;
  gap: 10px;
  align-items: center;
}
.btn {
  display: inline-block;
  text-decoration: none;
  padding: 10px 22px;
  border-radius: 6px;
  font-weight: 700;
  font-size: 14px;
  text-align: center;
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
}
.btn-register {
  background: var(--btn-bg);
  color: #1a1a1a;
  box-shadow: 0 0 12px rgba(255,211,107,0.3);
}
.btn-register:hover {
  box-shadow: 0 0 24px rgba(255,211,107,0.6);
  transform: translateY(-2px);
}
.btn-download {
  background: linear-gradient(180deg, #f0f0f0 0%, #c0c0c0 100%);
  color: #111111;
}
.btn-download:hover {
  box-shadow: 0 0 16px rgba(255,255,255,0.4);
  transform: translateY(-2px);
}
.mobile-nav-buttons {
  display: none;
}
.hamburger-menu {
  display: none;
}
.mobile-menu-overlay {
  display: none;
}
.site-footer {
  background: #111111;
  border-top: 2px solid var(--border-color);
  padding: 40px 0 0 0;
  margin-top: 40px;
}
.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  gap: 30px;
  padding: 0 30px 30px;
  flex-wrap: wrap;
}
.footer-column {
  flex: 1;
  min-width: 180px;
}
.footer-brand {
  flex: 2;
  min-width: 240px;
}
.footer-logo {
  font-size: 28px;
  font-weight: 900;
  color: var(--secondary);
  text-decoration: none;
  letter-spacing: 1px;
}
.footer-description {
  color: rgba(255,246,214,0.7);
  font-size: 14px;
  line-height: 1.6;
  margin-top: 10px;
  max-width: 280px;
}
.footer-heading {
  color: var(--secondary);
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 12px;
}
.footer-nav {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-nav li {
  margin-bottom: 8px;
}
.footer-nav a {
  color: rgba(255,246,214,0.8);
  text-decoration: none;
  font-size: 14px;
  transition: all 0.2s ease;
}
.footer-nav a:hover {
  color: var(--secondary);
  padding-left: 4px;
}
.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding: 15px 20px;
  text-align: center;
  background: #0A0A0A;
}
.footer-bottom p {
  margin: 0;
  color: rgba(255,246,214,0.6);
  font-size: 14px;
}
@keyframes marqueeLeft {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}
@media (max-width: 768px) {
  :root {
    --header-offset: 110px;
  }
  body {
    padding-top: var(--header-offset);
  }
  .header-container {
    width: 100%;
    max-width: none;
    padding: 8px 15px;
    min-height: 44px;
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  .nav-container {
    width: 100%;
    max-width: none;
    padding: 10px 15px;
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    gap: 0;
    overflow-y: auto;
  }
  .logo {
    font-size: 22px;
    order: 2;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
  }
  .desktop-nav-buttons {
    display: none;
  }
  .mobile-nav-buttons {
    display: flex;
    background: #0A0A0A;
    border-bottom: 1px solid var(--border-color);
    min-height: 48px;
    align-items: center;
  }
  .mobile-btn-container {
    display: flex;
    gap: 10px;
    justify-content: center;
    padding: 8px 15px;
    width: 100%;
  }
  .mobile-btn-container .btn {
    flex: 1;
    padding: 10px 12px;
    font-size: 14px;
    max-width: 50%;
  }
  .main-nav {
    display: none;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    width: 280px;
    height: 100%;
    background: #111111;
    z-index: 1002;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    justify-content: flex-start;
    align-items: flex-start;
    padding-top: 15px;
    border-right: 2px solid var(--border-color);
    box-shadow: none;
    overflow-y: auto;
  }
  .main-nav.active {
    display: block;
    transform: translateX(0);
  }
  .main-nav .nav-link {
    display: block;
    padding: 14px 20px;
    font-size: 16px;
    border-bottom: 1px solid #1a1a1a;
  }
  .hamburger-menu {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    cursor: pointer;
    background: transparent;
    border: none;
    padding: 5px;
    z-index: 1001;
    margin: 2px 0;
  }
  .hamburger-menu span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--secondary);
    border-radius: 2px;
    transition: all 0.3s ease;
  }
  .hamburger-menu.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  .hamburger-menu.active span:nth-child(2) {
    opacity: 0;
  }
  .hamburger-menu.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }
  .mobile-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.7);
    z-index: 999;
    display: none;
  }
  .mobile-menu-overlay.active {
    display: block;
  }
  body.no-scroll {
    overflow: hidden;
  }
  .footer-container {
    flex-direction: column;
    gap: 25px;
    padding: 0 20px 20px;
  }
  .footer-brand {
    min-width: 100%;
  }
  .footer-logo {
    font-size: 24px;
  }
  .footer-heading {
    font-size: 15px;
  }
  .page-content img {
    max-width: 100% !important;
    height: auto !important;
    display: block;
  }
  .page-content {
    overflow-x: hidden;
    max-width: 100%;
  }
  body {
    overflow-x: hidden;
  }
}
@media (max-width: 480px) {
  .header-container {
    padding: 6px 10px;
  }
  .nav-container {
    padding: 8px 10px;
  }
  .mobile-btn-container {
    padding: 6px 10px;
    gap: 8px;
  }
  .mobile-btn-container .btn {
    padding: 9px 10px;
    font-size: 13px;
    max-width: none;
  }
  .main-nav.active .nav-link {
    padding: 12px 15px;
    font-size: 15px;
  }
}
/* 移动端内容区防溢出（系统追加，请勿删除） */
@media (max-width: 768px) {
  .page-content img {
    max-width: 100% !important;
    height: auto !important;
    display: block;
  }
  .page-content {
    overflow-x: hidden;
    max-width: 100%;
  }
  body {
    overflow-x: hidden;
  }
}
/* 内容保护（系统追加，请勿删除） */
body {
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}
input, textarea, select, [contenteditable="true"] {
  -webkit-user-select: text;
  -moz-user-select: text;
  user-select: text;
}